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Engineering, Building, and Architecture

Not many museums collect houses. The National Museum of American History has four, as well as two outbuildings, 11 rooms, an elevator, many building components, and some architectural elements from the White House. Drafting manuals are supplemented by many prints of buildings and other architectural subjects. The breadth of the museum's collections adds some surprising objects to these holdings, such as fans, purses, handkerchiefs, T-shirts, and other objects bearing images of buildings.

The engineering artifacts document the history of civil and mechanical engineering in the United States. So far, the Museum has declined to collect dams, skyscrapers, and bridges, but these and other important engineering achievements are preserved through blueprints, drawings, models, photographs, sketches, paintings, technical reports, and field notes.

In the late 19th and early 20th centuries, several circular slide rules were made to resemble pocket watches. Fowler & Co., of Manchester, England, was a particularly notable manufacturer of this type of slide rule. The company was in business from 1898 to 1988 and made a large variety of calculators, although the labor-intensive nature of its manufacturing process produced expensive instruments that never sold in large numbers.

This example is the "long scale" model, consisting of a metal case with a ring, two knobs, and two rotating paper discs covered with glass. The front has a short logarithmic scale and a long logarithmic scale, laid out in six concentric circles rather than in a spiral. These scales are rotated by the knob on the left. The glass is marked with two hairlines. The interior of the disc reads: FOWLER'S (/) LONG SCALE CALCULATOR (/) PATENT (/) FOWLER & Co MANCHESTER.

The other knob rotates the seven scales on the back of the instrument: multiplication and division, reciprocals, logarithms, square roots, logarithmic sines, logarithmic tangents, and a second scale for logarithmic sines. The interior is marked: FOWLER'S (/) CALCULATOR (/) PATENT (/) FOWLER & Co MANCHESTER. There is one hairline indicator on the glass. The slide rule is with a tarnished square metal case, lined with purple velvet. The outside of the case is engraved: Fowler's (/) CALCULATOR. The inside is stamped: Fowler & Co. (/) CALCULATOR (/) SPECIALISTS (/) Manchester (/) ENGLAND.

William Henry Fowler (1853–1932) and his son, Harold Fowler, took out several British patents for improvements to circular calculators between 1910 and 1924. The first Fowler calculator with two knobs on the rim was patented in 1914. In 1927, Fowler & Co. introduced the Magnum Long Scale Calculator, which extended the scale length to 50 inches. Thus, this example is dated between 1914 and 1927.

Charles Looney (1906–1987), the donor of this slide rule, catalogued engineering drawings and trade literature at the Smithsonian after he retired from the University of Maryland–College Park, where he served as chair of the Department of Civil Engineering. He also donated his library of books and pamphlets to the Museum.

This is a 1/8-scale model of the tobacco ship Brilliant, a 250-ton vessel built in Virginia in 1775 for British owners. The Brilliant's first and probably only commercial venture from Virginia took place when it set sail for Liverpool, with a full hold of tobacco, in the summer of 1775. Typically the Brilliant would have returned with manufactured goods, but because of growing hostilities between Britain and the colonies, the ship remained in England. Records show that the Brilliant made one voyage to Jamaica and returned to London in 1776. Later that year, the Royal Navy purchased the vessel for just over £3,000 and converted it to a ship of war for service in the American Revolution.

The ship Brilliant had three masts and square-rigged sails. Its lower deck was 89'-3" long, its breadth was 27'-1/2", and the depth of the hold was 12'-2". The ship was built of oak, pine, and cedar. When purchased for war service, the Royal Navy assessed its hull, masts, and yards at £2,143. The cordage, including halyards, sheets, tack, and anchor cables, were assessed at £340. Brilliant's sails, 27 in all, were valued at £143. Five anchors were assessed at £58, while a long boat with a sailing rig and oars was estimated to be worth £45. Other items aboard the Brilliant were inventoried, including block and tackle, metal fittings, iron-bound water casks, hour and minute glasses, compasses, hammocks, an iron fire hearth, and 10 tons of coal.

After its conversion in 1776 as a ship of war in the Royal Navy, the Brilliant was commissioned as the HMS Druid. Its first voyage westbound across the Atlantic was as an escort for a convoy to the West Indies. The vessel served as the Druid until 1779, after which it became the fire ship Blast. In 1783, it was sold out of the service for £940 and, for the next 15 years, the former Virginia tobacco ship served as a whaler in Greenland. The vessel was lost in the Arctic in 1798.

This model was built by Charles and N. David Newcomb of Bolingbroke Marine in Trappe, Md. The model makers began their work in March 1975, scaling every timber to size and making everything out of the same type of wood as the original. They devised miniature rope-making equipment to manufacture the 5,000 feet of rigging and anchor cable required in 20 different sizes. Women from the Newcomb family and the surrounding community made the rigging and sails.

The model makers left the starboard side of the vessel unplanked to reveal the timbering and joinery of the hull and to permit a view of the vessel’s living accommodations in the stern and cargo stowage, complete with tobacco hogsheads.